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Finding the Fourth Proportional to 18,863.96, 28,290.02 and 6,381.66

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Solution

The fourth proportional to 18,863.96, 28,290.02 and 6,381.66 is: 9,570.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,863.96 : 28,290.02 = 6,381.66 : x
  2. Step 2: Convert to fraction form
    18,863.96/28,290.02 = 6,381.66/x
  3. Step 3: Cross multiply
    18,863.96x = 28,290.02 × 6,381.66
  4. Step 4: Simplify right side
    18,863.96x = 180,537,289.03
  5. Step 5: Solve for x
    x = 180,537,289.03/18,863.96
  6. Step 6: Final answer
    x = 9,570.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.